Root canal file

Abstract

A root canal file with a rotating application for widening of the root canal of human or animal teeth to a stipulated diameter and cone by means of cutting edges running in a spiral along the root canal file has much higher flexibility, especially in areas with large diameter. The root canal file has at least two cutting edges; at least one of the cutting edges is recessed over its height, as well as along the root canal file in sections, forming a recess in alternation in several cross-sectional planes.

1 . Root canal file for rotating application for widening of a root canal of human and animal teeth to a stipulated diameter and cone by means of cutting edges that run in a spiral along the root canal file, wherein the root canal file has at least two cutting edges, one of the cutting edges is recessed over the height and with a stipulated length along the root canal file in sections and in alternation with each other cutting edge in several cross-sectional planes. 
   
   
       2 . Root canal file according to  claim 1 , wherein the root canal file has a triangular cross-section, two cutting edges of a cross-sectional plane are provided with recesses, which extend over a stipulated length of the corresponding cutting edge in a longitudinal direction of the root canal file, the recesses of adjacent cross-sectional planes being arranged offset by a stipulated angle. 
   
   
       3 . Root canal file according to  claim 2 , wherein the stipulated angle in two cutting edges is 180° and in three cutting edges 120°. 
   
   
       4 . Root canal file according to  claim 1 , wherein a remaining cutting edge of a cross-sectional plane guides and centers the root canal file with the adjacent remaining cutting edges. 
   
   
       5 . Root canal file according to  claim 2 , wherein the recesses are formed by milling or grinding.